In the future, besides evaluating the quality of individual questions in terms of intelligibility, clarity, relevance and informativeness, we intend to assess the quality of sets of questions. Metrics such as Distinct-2 [1]} used by [2]} assess the lexical diversity of the sets whereas semantic diversity is the one that is critical for fact-checking [3]}.
The evaluation of a set of questions needs to take different dimensions into account and can depend on the nature of the claim for which we generate questions (e.g. a statement vs. an opinion).
Furthermore, we plan to assess questions considering the limitations of currently used search engines, i.e. whether the question is numerical, comparative, ambiguous, and whether its answer can, therefore, be easily fetched or not.
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